# Discrete Time Systems MCQ’s

This set of Digital Signal Processing Multiple Choice Questions & Answers (MCQs) focuses on “Discrete Time Systems”.

1. The system described by the input-output equations y(n)=x(-n) is a causal system.
a) True
b) False

2. The output signal when a signal x(n)=(0,1,2,3) is processed through an ‘Delay’ system is?
a) (3,2,1,0)
b) (1,2,3,0)
c) (0,1,2,3)
d) None of the mentioned

3. If a system does not have a bounded output for bounded input, then the system is said to be __________
a) Causal
b) Non-causal
c) Stable
d) Non-stable

4. If a signal x(n) is passed through a system to get an output signal of y(n)=x(n+1), then the signal is said to be ____________
a) Delayed
c) No operation
d) None of the mentioned

5. What is the output y(n) when a signal x(n)=n*u(n)is passed through an accumulator system under the conditions that it is initially relaxed?
a) n2+n+12
b) n(n+1)2
c) n2+n+22
d) None of the mentioned

6. The block denoted as follows is known as __________
a) Delay block
c) Multiplier block

7. The output signal when a signal x(n)=(0,1,2,3) is processed through an ‘Identical’ system is?
a) (3,2,1,0)
b) (1,2,3,0)
c) (0,1,2,3)
d) None of the mentioned

8. The system described by the input-output equations y(n)=x2(n) is a Non-linear system.
a) True
b) False

9. The system described by the input-output equation y(n)=nx(n)+bx3(n) is a __________
a) Static system
b) Dynamic system
c) Identical system
d) None of the mentioned

10. Whether the system described by the input-output equations y(n)=x(n)-x(n-1) a Time-variant system.
a) True
b) False

11. If the output of the system is y(n)=∑nk=−∞x(y) with an input of x(n) then the system will work as ___________
a) Accumulator